How to Create a Date Time Stamp in Sublime Text 2 on a Mac

datetimestamp.py

import datetime, getpass
import sublime, sublime_plugin

class AddDateTimeStampCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        self.view.run_command("insert_snippet", { "contents": "%s" %  datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") } )

class AddDateStampCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        self.view.run_command("insert_snippet", { "contents": "%s" %  datetime.datetime.now().strftime("%Y-%m-%d") } )

class AddTimeStampCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        self.view.run_command("insert_snippet", { "contents": "%s" %  datetime.datetime.now().strftime("%H:%M:%S") } )

Default (OSX).sublime-keymap

[
{"keys": ["super+alt+ctrl+d"], "command": "add_date_time_stamp" },
{"keys": ["super+alt+d"], "command": "add_date_stamp" },
{"keys": ["super+alt+t"], "command": "add_time_stamp" }
]

What would be an ideal way to implement this into a custom snippet?

How do you implement it?

Finally how does current date time inserted automatically in this snippet in place of $2 (i.e. Second Tab) ??

<snippet>
    <content><![CDATA[
/**
 * Author:      $1
 * DateTime:    $2
 * Description: $3
 */

]]></content>
    <!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
    <tabTrigger>/header</tabTrigger>
    <!-- Optional: Set a scope to limit where the snippet will trigger -->
    <scope>source.css,source.js,source.php</scope>
</snippet>

Thanks !